Fix menuItems language filtering

For wp-graphql v1.26 and later

src/MenuItem.php

@@ -7,18 +7,6 @@
 
 class MenuItem
 {
-    /**
-     * Convert menu location to match the one generated by Polylang
-     *
-     * Ex. TOP_MENU -> TOP_MENU___fi
-     */
-    static function translate_menu_location(
-        string $location,
-        string $language
-    ): string {
-        return "${location}___${language}";
-    }
-
     function init()
     {
         $this->create_nav_menu_locations();
@@ -30,52 +18,39 @@ function init()
             0
         );
 
+        // https://github.com/wp-graphql/wp-graphql/blob/release/v1.26.0/src/Data/Connection/MenuItemConnectionResolver.php#L107
         add_filter(
-            'graphql_connection_query_args',
-            [$this, '__filter_graphql_connection_query_args'],
+            'graphql_menu_item_connection_args',
+            [$this, '__filter_graphql_menu_item_connection_args'],
             10,
             2
         );
     }
 
-    function __filter_graphql_connection_query_args(
-        array $query_args,
-        AbstractConnectionResolver $resolver
+    function __filter_graphql_menu_item_connection_args(
+        array $args,
+        $unfiltered
     ) {
-        if (!($resolver instanceof MenuItemConnectionResolver)) {
-            return $query_args;
+        if (!isset($args['where']['location'])) {
+            return $args;
         }
 
-        $args = $resolver->getArgs();
+        $lang = $args['where']['language'] ?? null;
 
-        if (!isset($args['where']['language'])) {
-            return $query_args;
-        }
-
-        if (!isset($args['where']['location'])) {
-            return $query_args;
+        if (!$lang) {
+            return $args;
         }
 
         // Required only when using other than the default language because the
         // menu location for the default language is the original location
-        if (pll_default_language('slug') === $args['where']['language']) {
-            return $query_args;
+        if (pll_default_language('slug') === $lang) {
+            return $args;
         }
 
-        // Update the 'location' arg to use translated location
-        $args['where']['location'] = self::translate_menu_location(
-            $args['where']['location'],
-            $args['where']['language']
-        );
-
-        // XXX. This is a hack. Modify the protected "args" so we can re-execute
-        // the get_query_args method with the new "location" arg
-        $ref = new \ReflectionObject($resolver);
-        $args_prop = $ref->getProperty('args');
-        $args_prop->setAccessible(true);
-        $args_prop->setValue($resolver, $args);
+        // Ex. TOP_MENU -> TOP_MENU___fi
+        $args['where']['location'] .= '___' . $lang;
 
-        return $resolver->get_query_args();
+        return $args;
     }
 
     /**